Improvement in latches



M. 0'. &; s; s. NILES.

Latch.

Nd.202,573. x Ptented,Aprill6,188.

N ITED .STATES PATENT OFFICE.

MILTON O. NILES AND SIDNEY S. NILES, OF OAK PARE, ILLINOIS.

' IMPROVEMENT IN LATCHES.

Specfication forming part of Letters Patent No, 202,573, dated April 16, 1878 application filed July 19, 1877.

T0 all whom z't may concem:

-Be it knoWn that we, MIL1ON C. NILES and the khobs and spindl; Fig.4, a detailed view,

shor'ving the bolt or latch spring; and Fig. 5, plan vicw of the bolt-talons.

The invention consists in special devices for attaching knobs to the spindle and holding them from turning.

It also consists in the combination of the spindle, look-plate, tube, roses, and knobs, arranged so that the only bearing-ponts are the knob-shanks in the tube and front look-case.

It also consists in the peculiar construction of thebolt-talons and the combination there- With of the spindle.

It also consists in the peculiar construction and attachment of the retractng-spring; and it further consists of various devices and combinations, all of which will be hereinafter more fully set forth.

In the drawings, A represents a portion of the door to which the. look 'is applied, and B a rim-lock of any ordinary construction, the back plate b of which is provided With a tubular projection, b, which passes through a hole in the door, and has a screw-thread cut upon its outer end, and is held in place by means of a rose, 0, Which is threaded, so as to be turned upon the outer end of the tube, as shown in Fig. 2 of the drawings. .ljhe spindle D is round, and may be made of ordinary round bar-iron. It is enough smaller than the tubular portion b, through Whi0h it passes, to allow the inner end of the knob-shank to pass over it and have a bearing within the tube, and is provided With a cam-piece, 61, for operating the bolt-talons. This cam is made separately from the spindle, and has its central portion made to fit the spindle, upon which it is placed, and secured by means of a screw or rivet, et, in position, its location being withtalons.

the pin f of a pivoted or swinging latch or bolt, F.

The retracting-spring G is coiled upon a rod,

9, which is fastened to the outside of the back plate in snob a position that the unooiled portion of the spring Will come down in front and bear agaist the inner face of the bolt F, as

shown in Fig. 2 of the drawings. This spring is a double coilthat is, the two ends are coiled upon. the rod, while the central portion extends out from the latter,to act as a retractor upon the swing-bolt whenever it is drawn inward by the reciprocation of the camtalons E.

Upon the look Side of the door is a knob, H, the shank of which is fitted to the orifice of the lock-case, which forms a bearing for the shank. The knob-shank is also hollow, .so as to fit over the end of the spindle, t0 whioh it is secured by means of a loose pin, h, passing through the shank and spindle.

The inner end of the shank is flush with the inner face of the look-case, except a small portion theieof, h, whioh extends still farther inward and passes over the outside of the cam-. piece d, as shown in Figs. 2 and 3 of the drawings, thereby assisting to hold the latter in place, and also binding the knob-shank tightly upon the spindle. The pin h is dropped in its place by pushin g the end of the spindle inward, so that the hole therein will be inside the case, the back plate of which has been removed, and the knob and spindle are again drawn outward until the eam on the spindle strikes the case, when the pin will be within the bearing on the case for the knob-shank, and is thereby prevented from falling out. A knob, I, is also secured upon the rose side of the door. It is of similar construction, and its shank fits the orifice in the tube, which furnishes a bearingupon which it may turn. The inner end of this knob-sbank is pror ided With notches or.slots 6, which receive a stud, d rigidly fastened in the spindle D, or cast there- With, and projecting far enough to engage With a knob-shank, but not so far as to prevent the insertion of the spindle through the tube b.

This device prevents the knob I from turning on the spindle, and it is secured to the latter by means of a pin, 2', which may be inserted in any one of a series holes in this end of the spindle, thereby enabling the rose and knob to be adjusted to suit doors of difierent thicknesses.

The cam d upon the spindle Dis made of such Width as to exactly fill the space bctween the two plates of the look-case, and longer than the diameter of the orifices in the lookcase, and therefore, whcn in position and the back-plate is fastened in the nsnal manner, the spindle is secured to the case, so that it cannot slide therein 01' be removed therefrom.

It will be seen from the above description that the only bearing-points causin g friction in turning the spindle are the knob-sbanks upon the end of the tube and in the orifice in the outside of the look.

The retracting spring and other devices herein described are also applicable t0 straight as well as swingin g bolts.

The advantage of the construction and arrangement of the spring herein described is that it gives a longer spring to act upon the bolt as compared with those usually employed, and thereby using less of the clasticity of the spring in each retraction of the boit, by which fact greater durability of the sprin g and ease of action are secured.

The construction and arrangement of the spindle are applicable to a mortise-lock as well as a rin -look, which is the kind shown in the drawings. We do 'not therefore limit ourselves to the particular kind of look and boit herein shown and described.

The peculiar means by which the knob-shanks are prevented from turning on the spindle effectually obviates all looseness of these joints, for as the devices make slip-joints they can be fltted mach closer than pins passing through spindle and shanks.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. The knob H, having an extension, h, at its inner end, in combination With the cam d on the spindle D, fitting closely under the extension on the knob-shank, substantially as and for the purpose set forth.

2. The spindle D, provided With a cam, d, in combination With the knob H and loose pin or piece h resting in the outer look-plate, whereby the parts are fastened together and held fron1 slipping back and forth in the case, substantially as described.

3. The look-case B, in combination With a spring, G, attached outside of the case, the free end of Whih is arranged to retract the bolt, substantially as and for the purpose set forth.

4. The spindle D, provided With a stud, d in combination With the knob I, having slots 2' in the inner end of its shank, and the pin 2", substantially as described.

5. The look-case B, in combi nation with the pin g, attached to the outside of the back plate, the spring G, and the pivoted bolt F, substantially as and for the purpose set forth.

MILTON C. NILES. SIDNEY S. NILES.

VVitnesses:

BORT. S. GOODMAN, J NO. 0. MACGREGOR. 

